J2253+1608

General information

Source (J2000)IAU Source name (J2000)
J2253+1608
Source (B1950)IAU Source name (B1950)
2251+158
Common nameCommon name
3C 454.3
J2000 coordinatesRight ascension α and declination δ in J2000 epoch
α = 22 53 57.747937, δ = +16 08 53.560940
RedshiftRedshift
z = 0.859
Source typeOptical class
BL Lac object
Optical V magnitudeOptical V magnitude
mV = 16.1

Images and parameters

Observation epoch2010-10-01
S86 GHzTotal single dish flux density measured at 86 GHz obtained from pointing and calibration scan measurements at Pica Veleta or Plateau de Bure [Jy]
30.38
SS [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
35.567 ± 0.4
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
58
SL [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
9.27 ± 0.124
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
2329
Ba [μas]Major axis of the restoring beam [μas]
469
Bb [μas]Minor axis of the restoring beam [μas]
72
BPA [degrees]Position angle of the major axis [degrees]
-15.7
St [mJy]Total clean flux density [mJy]
21958
Sp [mJy/beam]Peak flux density [mJy/beam]
10166
σ [mJy/beam]Off-source r.m.s. noise in the residual image [mJy/beam]
338
ξrQuality factor of the residual
noise in the image
1.1

Component
StotTotal flux density of the component [mJy]
SpeakPeak flux density of the component [mJy/beam]
dComponent size [μas]
rComponent's offset from the core [μas]
θPosition angle of the offset [degrees]
TbBrightness temperature obtained from the model fits [1010K]
Tb,minVisibility based estimate of the minimum brightness temperature [1010K]
Tb,limVisibility based estimate of the maximum brightness temperature [1010K]
1 23016 ± 4721 9805 ± 1850 233 ± 44 0 0 13.026 ± 4.384 147.00 2240.00
2 10128 ± 3065 4842 ± 1322 221 ± 60 293 ± 30 -81.1 ± 5.9 6.388 ± 3.134 N/A N/A
Observation epoch2011-05-01
S86 GHzTotal single dish flux density measured at 86 GHz obtained from pointing and calibration scan measurements at Pica Veleta or Plateau de Bure [Jy]
15.97
SS [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
16.897 ± 0.269
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
63
SL [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
1.061 ± 0.075
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
1770
Ba [μas]Major axis of the restoring beam [μas]
249
Bb [μas]Minor axis of the restoring beam [μas]
88
BPA [degrees]Position angle of the major axis [degrees]
-17
St [mJy]Total clean flux density [mJy]
17324
Sp [mJy/beam]Peak flux density [mJy/beam]
4550
σ [mJy/beam]Off-source r.m.s. noise in the residual image [mJy/beam]
74
ξrQuality factor of the residual
noise in the image
1.04

Component
StotTotal flux density of the component [mJy]
SpeakPeak flux density of the component [mJy/beam]
dComponent size [μas]
rComponent's offset from the core [μas]
θPosition angle of the offset [degrees]
TbBrightness temperature obtained from the model fits [1010K]
Tb,minVisibility based estimate of the minimum brightness temperature [1010K]
Tb,limVisibility based estimate of the maximum brightness temperature [1010K]
1 5857 ± 977 3960 ± 547 94 ± 13 0 0 20.169 ± 5.182 8.09 27.40
2 4871 ± 1213 1360 ± 326 264 ± 63 159 ± 32 -102.4 ± 11.3 2.135 ± 0.899 N/A N/A
3 614 ± 331 466 ± 200 90 ± 39 324 ± 19 -84.2 ± 3.4 2.341 ± 1.902 N/A N/A
4 1038 ± 533 382 ± 184 242 ± 116 445 ± 58 -63.2 ± 7.5 0.545 ± 0.465 N/A N/A
5 1185 ± 467 723 ± 243 118 ± 40 511 ± 20 -86.7 ± 2.2 2.613 ± 1.615 N/A N/A
6 861 ± 429 441 ± 196 185 ± 82 868 ± 41 -53.9 ± 2.7 0.774 ± 0.620 N/A N/A
7 2326 ± 856 658 ± 233 304 ± 108 945 ± 54 -36.1 ± 3.3 0.771 ± 0.480 N/A N/A
8 548 ± 315 416 ± 191 72 ± 33 995 ± 17 -75.4 ± 1.0 3.236 ± 2.807 N/A N/A
9 608 ± 377 300 ± 167 285 ± 159 1380 ± 79 -70.0 ± 3.3 0.229 ± 0.228 N/A N/A
Observation epoch2011-10-01
S86 GHzTotal single dish flux density measured at 86 GHz obtained from pointing and calibration scan measurements at Pica Veleta or Plateau de Bure [Jy]
5.74
SS [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
5.792 ± 0.051
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
59
SL [Jy]Correlated flux density [Jy] measured on projected baseline length listed in the next column
0.476 ± 0.03
BS [Mλ]Projected baseline length [Mλ] for the measured flux density listed in the previous column
3065
Ba [μas]Major axis of the restoring beam [μas]
270
Bb [μas]Minor axis of the restoring beam [μas]
34
BPA [degrees]Position angle of the major axis [degrees]
-5
St [mJy]Total clean flux density [mJy]
4073
Sp [mJy/beam]Peak flux density [mJy/beam]
1100
σ [mJy/beam]Off-source r.m.s. noise in the residual image [mJy/beam]
21
ξrQuality factor of the residual
noise in the image
1.03

Component
StotTotal flux density of the component [mJy]
SpeakPeak flux density of the component [mJy/beam]
dComponent size [μas]
rComponent's offset from the core [μas]
θPosition angle of the offset [degrees]
TbBrightness temperature obtained from the model fits [1010K]
Tb,minVisibility based estimate of the minimum brightness temperature [1010K]
Tb,limVisibility based estimate of the maximum brightness temperature [1010K]
1 976 ± 207 839 ± 135 19 ± 3 0 0 80.266 ± 24.921 12.50 26.90
2 1795 ± 722 150 ± 60 327 ± 131 56 ± 65 -97.9 ± 49.2 0.515 ± 0.358 N/A N/A
3 587 ± 284 111 ± 53 174 ± 83 377 ± 41 -62.2 ± 6.3 0.593 ± 0.492 N/A N/A
4 699 ± 270 168 ± 63 70 ± 26 473 ± 13 -79.1 ± 1.6 4.349 ± 2.860 N/A N/A
5 456 ± 227 107 ± 52 92 ± 45 582 ± 22 -101.2 ± 2.2 1.641 ± 1.394 N/A N/A

Downloads

Epoch Image UV plot RAD plot FITS file of Image
2010-10-01 eps, jpg eps, jpg eps, jpg fits
2011-05-01 eps, jpg eps, jpg eps, jpg fits
2011-10-01 eps, jpg eps, jpg eps, jpg fits